I have the same problem, with a Model 3 made by China, this is the photo before drilling to use an EZ tap/bolt extractor bit, with a loose guarantee that it can handle a high level of torque, to then have it snap off in the hole that was drilled. Broke off flush, and with another form of extractor on order, the question is, can I drill a larger hole to bore out the ez tap and try again with a higher gauge extractor?
I’ve got a replacement bolt on hand, if I get ever get the current bolt out.